"إِذَا اِشْتَرَيْتَ مَتَاعاً فِيهِ كَيْلٌ أَوْ وَزْنٌ فَلاَ تَبِعْهُ حَتَّى تَقْبِضَهُ إِلاَّ أَنْ تُوَلِّيَهُ فَإِنْ لَمْ يَكُنْ فِيهِ كَيْلٌ وَ لاَ وَزْنٌ فَبِعْهُ ".
"If you purchase goods that require measuring or weighing, do not sell them until you take possession of them - unless you appoint someone to take possession on your behalf. However, if the goods do not require measuring or weighing, then you may sell them immediately."